Water and electricity separated ptc heater

Abstract

The utility model discloses a water and electricity separation's PTC heater, including liquid tank, the heating base of being placed in the liquid tank and the PTC heating core body of being placed in the heating base, be equipped with the water inlet and the water outlet on the liquid tank, be equipped with the open mouth for the heating base insertion on the liquid tank, be equipped with at least two first buckles on the heating base, and the first buckle is clamped on the edge of the open mouth, and the support, the upper cover are equipped successively from bottom to top on the open mouth, be equipped with the second buckle on the support, and the support is connected with the liquid tank through the second buckle, and the upper cover is fixed on the support. Compared with prior art, set up first buckle on the heating base, and the open mouth edge of liquid tank is connected through first buckle, so that the liquid tank is limited by first buckle when meeting heat deformation, and the deformation of liquid tank is limited twice by second buckle, and the problem that the gap between the waterproof sealing ring is produced and the water leakage is caused to lead to the waterproof failure of preventing the liquid tank from deforming is prevented through double limitation, and the waterproof effect of product is improved.

Description

Technical Field

[0001] This utility model relates to a PTC heater, and more particularly to a PTC heater with water-electricity separation. Background Technology

[0002] In existing small water tank-type PTC heaters, the main structure of the liquid tank and some components are usually fixed with screws. This results in a low overall protection level and fails to achieve water and electricity separation. Some sealing parts are even sealed with glue, which is not only unsightly but also makes it difficult to ensure product consistency and may not even provide a significant seal, compromising product safety. To reduce the use of screws, some manufacturers use clips to connect the bracket to the liquid tank body. The bracket and heating base, as well as the heating base and top cover, are sealed with waterproof sealing rings to solve this problem. However, it has been found that since the main structure of the liquid tank is usually made of plastic, it can deform at high temperatures, creating gaps between the plastic and the waterproof sealing rings, leading to waterproofing failure and leakage. Summary of the Invention

[0003] The purpose of this invention is to provide a PTC heater with water-electricity separation, and the technical problem to be solved is to improve the waterproof effect of the product.

[0004] To solve the above problems, the present invention adopts the following technical solution: a PTC heater with water-electricity separation, including a liquid tank, a heating base placed in the liquid tank, and a PTC heating core placed in the heating base. The liquid tank is provided with an inlet and an outlet, and an opening for the heating base to be inserted. At least two first buckles are provided on the heating base, and the first buckles are snapped on the edge of the opening. A bracket and a top cover are provided sequentially from bottom to top on the opening. The bracket is provided with a second buckle, and the bracket is snapped into the liquid tank through the second buckle. The top cover is fixed on the bracket.

[0005] Furthermore, the first buckle is disposed on the upper edge of the heating base, and it is inverted L-shaped, including a first extension and a second extension. An insertion groove is formed between the first extension, the second extension and the outer wall of the heating base, and the open edge is inserted into the insertion groove.

[0006] Furthermore, the second buckle is disposed on the periphery of the bracket and extends downward therefrom. The second buckle has a buckle hole and a protrusion on the outer surface of the liquid tank that matches the buckle hole.

[0007] Furthermore, the bracket is provided with a circuit board, and the circuit board has exposed holes that are opposite to the positions of the electrode plate pins on the PTC heating core. The exposed holes have spring contacts that make electrical contact with the electrode plate pins. The spring contacts are connected to the printed circuits on the circuit board. The bracket is provided with through holes for the electrode plate pins to pass through.

[0008] Furthermore, the spring is positioned at a location opposite to the two sides of the exposed hole and the electrode plate pin.

[0009] Furthermore, the spring clips on the exposed holes are misaligned.

[0010] Furthermore, the liquid tank is provided with a detachable water pipe bracket, which is located near the water inlet and / or water outlet.

[0011] Furthermore, the water pipe support is provided with a water pipe slot.

[0012] Furthermore, waterproof sealing rings are provided between the opening and the heating base, and between the heating base and the top cover.

[0013] Furthermore, the opening is provided with a stepped structure, and the outer surface of the stepped structure is provided with a clearance groove to avoid the first buckle and the second buckle.

[0014] Compared with the prior art, this utility model has a first buckle on the heating base. The first buckle is used to lock the open edge of the liquid tank. When the liquid tank deforms due to heat, it is restricted by the first buckle. The second buckle further restricts the deformation of the liquid tank. This double restriction prevents the liquid tank from deforming and creating gaps between itself and the waterproof sealing ring, thus preventing water leakage and waterproof failure. This improves the waterproof effect of the product. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] Figure 2 This is an exploded view of the present invention.

[0017] Figure 3 This is a side view of the present invention.

[0018] Figure 4 yes Figure 3 A sectional view along the A-A direction.

[0019] Figure 5 yes Figure 3 A cross-sectional view along the B-B direction.

[0020] Figure 6 yes Figure 3 A cross-sectional view along the C-C direction.

[0021] Figure 7 This is a schematic diagram of the pin connection between the circuit board and the electrode plate of this utility model. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0023] like Figure 1 , Figure 2 and Figure 3 As shown, this utility model discloses a PTC heater with water-electricity separation, including a liquid tank 1. The liquid tank 1 is made of plastic material and is rectangular. The liquid tank 1 has an opening 11, so that the liquid tank has two opposing first surfaces 101, two opposing second surfaces 102, and a bottom surface 103. The area of ​​the two first surfaces 101 is smaller than the area of ​​the two second surfaces 102. A water inlet is provided on one of the first surfaces 101, and a water outlet is provided on the bottom surface 103 at the end away from the water inlet. Both the water inlet and the water outlet are connected to the inner cavity of the liquid tank 1. A heating base 2 is provided in the inner cavity of the liquid tank 1. The heating base 2 is made of thermally conductive metal material such as aluminum profile. The heating base 2 has a cavity for inserting a PTC heating core 3. The PTC heating core 3 is provided in the cavity. A first buckle 21 is provided on the upper edge of the heating base 2 and on the two ends of the second surface 102. The first buckle 21 is integrally formed with the heating base 2. The shape of the first buckle 21 is an inverted L-shape. Figure 4 As shown, the liquid tank 11 includes a first extension 211 and a second extension 212. The first extension 211 extends horizontally, and the second extension 212 extends vertically downward. An insertion groove is formed between the first extension 211, the second extension 212, and the outer wall of the heating base 2. The edge of the opening 11 is inserted into the insertion groove so that the first buckle 21 can "hold" the edge of the opening 11 of the liquid tank 1, limiting its deformation when exposed to high temperatures. A bracket 4 and a top cover 5 are arranged sequentially from bottom to top on the opening 11. A second buckle 41 is provided on the bracket 4. The bracket 4 is engaged with the liquid tank 1 through the second buckle 41 to achieve secondary restriction on the edge of the opening 11, so that the liquid tank 1 is restricted when exposed to high temperatures, preventing the seal from failing. The bracket 4 is also used to press and fix the heating base 2 in the liquid tank 1. The top cover 5 is fixed to the bracket 4 by ultrasonic welding. Waterproof sealing rings 8 are provided between the opening 11 and the heating base 2, and between the heating base 2 and the top cover 5, so that the waterproof of the product meets the IP67 requirement.

[0024] like Figure 1 , Figure 2 As shown, in this utility model, the first buckle 21 is located in the middle of the heating base 2, while the second buckle 41 is respectively set on one end of the bracket 4 and the second surface 102 on the same side. There are two second buckles 41 on each side, symmetrically arranged on both sides of the first buckle 21.

[0025] like Figure 1 and Figure 2 as well as Figure 5As shown, the second buckle 41 is spring-shaped and extends downwards away from the support. The second buckle 41 has a buckle hole 411, and the second surface 102 has a protrusion 12 that matches the buckle hole 411. When the second buckle 41 engages with the liquid tank 1, the buckle hole 411 engages with the protrusion 12. Specifically, an inclined first guide slope 412 is provided on the surface opposite to the second surface 102 at the end of the buckle hole 411 away from the support 4. Correspondingly, a second guide slope 121 that matches the first guide slope 412 is provided on the protrusion 12. When the support 4 is pressed down, the first guide slope 412 on the second buckle 41 and the second guide slope 121 on the protrusion 21 guide each other, causing the second buckle 41 to open outwards. After the first guide slope 412 and the second guide slope 121 separate, the second buckle 41 resets, and the protrusion 12 fully enters the buckle hole 411, thus achieving engagement.

[0026] like Figure 2 As shown, the opening 11 is provided with a stepped structure 111. The outer surface of the stepped structure 111 is provided with a relief groove 112 to avoid the first buckle 21 and the second buckle 41. The protrusion 12 is located in the relief groove 112. The heating base 2 is provided with a circumferential protrusion so that after the heating base 2 is placed in the inner cavity of the liquid tank 1, the protrusion abuts against the stepped structure 111. The waterproof sealing ring 8 on the heating base 2 is fitted on the heating base 2 near the protrusion so that the waterproof sealing ring 8 and the stepped structure 111 are sealed. A groove is provided on the end of the protrusion facing the bracket. The waterproof sealing ring 8 between the bracket 4 and the heating base 2 is placed in the groove. Specifically, the stepped structure 111 has two steps. The protrusion abuts against the upper step. The waterproof sealing ring 8 fitted on the heating base 2 is placed in the lower step. The bracket 4 is also placed in the upper step.

[0027] like Figure 2 As shown, an upwardly extending extension arm 113 is provided at the upper end of the opening 11. The extension arm 113 is spaced around the opening 11 to accommodate the bracket 4. The upper edge of the extension arm 113 is aligned with the upper surface of the bracket 4. The upper cover 5 is also ultrasonically welded to the upper end of the extension arm 113 during ultrasonic welding.

[0028] The first and second clips limit the high-temperature deformation of the liquid tank, preventing gaps between the liquid tank and the heating base from causing sealing failure. In addition, the second clip also locks the bracket and the liquid tank together, eliminating the hassle of screwing in screws and facilitating disassembly and assembly during production.

[0029] Waterproof sealing rings 8 are provided between the opening 11 and the heating base 2, and between the heating base 2 and the upper cover 5, achieving a two-level waterproof seal. The upper cover 5 and the bracket 4 are ultrasonically welded to further achieve an IP67 waterproof rating.

[0030] like Figure 6 and Figure 7 As shown, a circuit board 6 is provided on the bracket 4. The circuit board 6 has an exposed hole 61 that is opposite to the position of the electrode plate pin 31 on the PTC heating core 3. A spring contact 611 is provided on the exposed hole 61 to make electrical contact with the electrode plate pin 31. The spring contact 611 is connected to the printed circuit on the circuit board 6. A power line is provided on the circuit board 6 and is connected to the printed circuit. A through hole 42 is provided on the bracket 4 for the electrode plate pin to pass through. After the electrode plate pin 31 passes through the through hole 42, it contacts the spring contact 611 in the exposed hole 61 to make electrical contact. The electrode plate pin 31 and the circuit board 6 are connected by plug-in connection. This not only saves the operation of parallel wiring of materials and wires, but also saves the product parallel wiring space, and improves the stability of the connection and production efficiency.

[0031] like Figure 7 As shown, the spring pieces 611 are positioned opposite to the two surfaces of the exposed hole 61 and the electrode plate pin 31. Specifically, two spring pieces 611 are provided on one side of each exposed hole 61, and one spring piece 611 is provided on the other side. The spring pieces 611 on both sides are staggered.

[0032] like Figure 1 and Figure 2 As shown, the liquid tank 1 is provided with a detachable water pipe bracket 7. The water pipe bracket 7 is located near the water outlet. The water pipe bracket 7 is connected and fixed to the liquid tank 1 by plugging in, so as to fix the water pipe and prevent the water pipe from easily separating from the water outlet. Specifically, the water pipe bracket 7 is provided with a water pipe groove 71.

Claims

1. A PTC heater with water-electricity separation, comprising a liquid tank (1), a heating base (2) placed inside the liquid tank (1), and a PTC heating core (3) placed in the heating base (2), wherein the liquid tank (1) is provided with an inlet and an outlet, characterized in that: The liquid tank (1) is provided with an opening (11) for inserting the heating base (2). The heating base (2) is provided with at least two first buckles (21). The first buckles (21) are fastened to the edge of the opening (11). The opening (11) is provided with a bracket (4) and a top cover (5) from bottom to top. The bracket (4) is provided with a second buckle (41). The bracket (4) is fastened to the liquid tank (1) by the second buckle (41). The top cover (5) is fixed on the bracket (4).

2. The PTC heater for water-electricity separation according to claim 1, characterized in that: The first buckle (21) is located on the upper edge of the heating base (2). It is inverted L-shaped and includes a first extension (211) and a second extension (212). An insertion groove is formed between the first extension (211), the second extension (212) and the outer wall of the heating base (2). The edge of the opening (11) is inserted into the insertion groove.

3. The PTC heater for water-electricity separation according to claim 1, characterized in that: The second buckle (41) is located on the periphery of the bracket (4) and extends downward. A buckle hole (411) is provided on the second buckle (41), and a protrusion (12) that matches the buckle hole (411) is provided on the outer surface of the liquid tank (1).

4. The PTC heater with water-electricity separation according to any one of claims 1-3, characterized in that: The bracket (4) is provided with a circuit board (6), the circuit board (6) is provided with an exposed hole (61) that is opposite to the position of the electrode plate pin on the PTC heating core (3), the exposed hole (61) is provided with a spring piece (611) that is electrically in contact with the electrode plate pin, the spring piece (611) is connected to the printed circuit on the circuit board (6), and the bracket (4) is provided with a through hole (42) for the electrode plate pin to pass through.

5. The PTC heater with water-electricity separation according to claim 4, characterized in that: The spring piece (611) is positioned opposite to the two sides of the exposed hole (61) and the electrode plate pin.

6. The PTC heater for water-electricity separation according to claim 5, characterized in that: The spring piece (611) on the exposed hole (61) is misaligned.

7. The PTC heater with water-electricity separation according to claim 1, characterized in that: The liquid tank (1) is provided with a detachable water pipe bracket (7), which is located near the water inlet and / or water outlet.

8. The PTC heater with water-electricity separation according to claim 7, characterized in that: The water pipe bracket (7) is provided with a water pipe slot (71).

9. The PTC heater for water-electricity separation according to claim 1, characterized in that: Waterproof sealing rings (8) are provided between the opening (11) and the heating base (2), and between the heating base (2) and the top cover (5).

10. The PTC heater for water-electricity separation according to claim 1, characterized in that: The opening (11) is provided with a stepped structure (111), and the outer surface of the stepped structure (111) is provided with a relief groove (112) that avoids the first buckle (21) and the second buckle (41).

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